- not invading adjacent healthy cells, blood vessels, or tissues; localized: a noninvasive tumor.
- not entering or penetrating the body or disturbing body tissue, especially in a diagnostic procedure.
- (of medical treatment) not involving the making of a relatively large incision in the body or the insertion of instruments, etc, into the patient
- Not penetrating the body, as by incision. Used especially of a diagnostic procedure.
- Not invading healthy tissue.